Pranayama aims at bringing the involuntary functions
of the respiratory mechanism within human control. The term pranayama
has been constituted by two words: Prana + Ayama. Prana is the vital
force which pervades the whole cosmos. Prana is more subtle than air and
can be defined as the energy essence that is within everything in the
universe. Prana is the principle of development and sustenance both of
the nervous and cellular tissues of the body and the mind.
In the process of breathing when the prana air is inhaled, definite
action takes place. One is related to the ingestion of oxygen into the
alveoli and the other to the ingestion of the nervous energy into the
brain system.
Ayama means to control or to give a rhythm or a definite flow. In this
sense Pranayama may be defined as a process and technique through which
vital energy can be stimulated and increased: and this brings about
perfect control over the flow of Prana within the body.
Pranayama is an exact science. Regulation of breathing, as a matter of
fact, is natural. It hardly offers any scope of artificiality. The
breath enters through the nose and depending on ones general health and
strength of the lungs; it is retained inside and then is exhaled. This
natural condition of intake and outflow of the breath goes on
continuously and it is on this process that human life depends. The
difference between this natural process and the 'Pranayama' is that in
the former the inhalation and exhalation is not necessarily connected
with the mind ; that process continues owing to the natural functioning
of the heart and lungs. The inhalation and the exhalation are, hence,
not of any set duration. In some person the inhalation may take a longer
time than the exhalation and in some others the opposite may occur. In
Pranayama, however, there is a systematic regulation of both the
inhalation and exhalation. This is for the reason that the mind is
joined to the action of inhalation and exhalation known as Puraka and
Rechaka respectively in practicing the Pranayama. Hence their longer and
shorter duration within a specified time has to be controlled. The
result of this controlled inhalation and exhalation, both in respect of
speed and time has a mere beneficial effect on the mind and the body
than that of the natural process. Most of us who largely depend on the
natural process will derive immense benefit on falling ill by controlled
inhalation and exhalation. Such person should inhale slowly and exhale
equally slowly in the beginning for 5 to 10 times depending on their
strength and continue doing this morning and evening for 25 to 30 day.
The natural inhalation is hence called "SWASHANA" or breathing
and that inhalation and exhalation which is done extending time limit by
applying the power of mind is called "DEERGHASWASHANA" or
Pranayama.






